2BK9G-DIF-AU-V3Scent diffuser

FCC Warnning: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection againstharmful interference in a residential installation. This equipment generates, uses and can radiateradio frequency energy and, if not installed and used in accordance with the instructions, maycause harmful interference to radio communications. However, there is no guarantee thatinterference will not occur in a particular installation. If this equipment does cause harmfulinterference to radio or television reception, which can be determined by turning the equipmentoff and on, the user is encouraged to try to correct the interference by one or more of thefollowing measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body.

Green Scent Biotech Company Ltd #10/B, China Science Joint Center, Zhenxing RD, Guangming Dist, Shenzhen City, Guangdong, China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2025/12/04 U.S. Agent Designation Green Scent Biotech Company Ltd acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought (FCC ID: 2BK9G-DIF-AU-V3): Name and company of U.S. agent: GLOCERTS TECHNOLOGY INC Physical U.S. address of agent: 19784 SUNKISSED RIDGE DR RIVERSIDE, CA 92507 United States FRN of U.S. agent: 0036339737 Email address of U.S. agent: [email protected] GLOCERTS TECHNOLOGY INC acknowledges their obligation to accept service of process on behalf of Green Scent Biotech Company Ltd Green Scent Biotech Company Ltd with the FRN [0035973429] accepts its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission- related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. Sincerely, Signature Huaqin huang General Manager Green Scent Biotech Company Ltd Signature Huiying Fan Director GLOCERTS TECHNOLOGY INC 48_[mo del] US_Agent_2.911(d)(7) - U, V0 5

FCC ID: 2BK9G-DIF-AU-V3 External Photos of the EUT FCC ID: 2BK9G-DIF-AU-V3 FCC ID: 2BK9G-DIF-AU-V3

Label and Location Size: L: 3.0cm*W: 2.0cm Label and Location FCC ID : 2BK9G-DIF-AU-V3

FCC ID: 2BK9G-DIF-AU-V3 Internal Photos of the EUT FCC ID: 2BK9G-DIF-AU-V3 FCC ID: 2BK9G-DIF-AU-V3 FCC ID: 2BK9G-DIF-AU-V3 ANT

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn RF Exposure MPE Report Reference No. ..................... : FCC ID............................................. : CTA25112700802 2BK9G-DIF-AU-V3 Compiled by ( position+printed name+signature) . : File administrators Zoey Cao Supervised by ( position+printed name+signature) . : Project Engineer Ace Chai Approved by ( position+printed name+signature) . : RF Manager Eric Wang Date of issue .................................... : Dec. 03, 2025 Testing Laboratory Name .............. : Shenzhen CTA Testing Technology Co., Ltd. Address............................................ : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Applicant’s name ............................ : Green Scent Biotech Company Ltd Address............................................ : #10/B, China Science Joint Center, Zhenxing RD, Guangming Dist, Shenzhen City, Guangdong, China Standard ........................................... : 47CFR §1.1310 47CFR §2.1091 KDB447498 D01 General RF Exposure Guidance v06 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purpses as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : Scent diffuser Trade Mark ....................................... : AH Manufacturer .................................... : Green Scent Biotech Company Ltd Model/Type reference ...................... : DIF-AU-V3 Listed Models ................................... : DIF-AU-V2, DIF-AU-V4, DIF-AU-V5 Rating ............................................... : DC 5.0V From external circuit Result ............................................... : PASS Report No.: CTA25112700802 Page 2 of 8 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : Scent diffuser Model /Type : DIF-AU-V3 Listed Models : DIF-AU-V2, DIF-AU-V4, DIF-AU-V5 Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number and colour is different for these model. Applicant : Green Scent Biotech Company Ltd Address : #10/B, China Science Joint Center, Zhenxing RD, Guangming Dist, Shenzhen City, Guangdong, China Manufacturer : Green Scent Biotech Company Ltd Address : #10/B, China Science Joint Center, Zhenxing RD, Guangming Dist, Shenzhen City, Guangdong, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA25112700802 Page 3 of 8 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 TEST STANDARDS ............................................................................................................ 4 2 SUMMARY .......................................................................................................................... 5 2.1 General Remarks ..................................................................................................... 5 2.2 Product Description ................................................................................................. 5 2.3 Special Accessories ................................................................................................. 5 2.4 Modifications ............................................................................................................ 5 3 TEST ENVIRONMENT ....................................................................................................... 6 3.1 Address of the test laboratory .................................................................................. 6 3.2 Test Facility .............................................................................................................. 6 3.3 Statement of the measurement uncertainty ............................................................. 6 4 Test limit .............................................................................................................................. 7 4.1 Requirement ............................................................................................................ 7 4.2 MPE Calculation Method ......................................................................................... 7 4.3 Conducted Power Results ....................................................................................... 7 4.4 Manufacturing tolerance .......................................................................................... 8 4.5 Standalone MPE Result ........................................................................................... 8 4.6 Simultaneous Transmission for MPE Result ........................................................... 8 5 Conclusion ........................................................................................................................... 8 Report No.: CTA25112700802 Page…

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 Antenna Specification Manufacturer:Green Scent Biotech Company Ltd Address:#10/B, China Science Joint Center, Zhenxing RD, Guangming Dist, Shenzhen City, Guangdong, China 一、Dimensions 二、General Specifications Part Number PCB_ANTENNA Frequency Range 2400 ‐ 2500 Mhz Band Width 100MHz Peak Gain ‐0.5 dBi Return Loss ‐10dB (MAX) VSWR ≤2.0(MAX) Antenna type FR4_ PCB _Antenna Antenna size 10.2 x 3.5 mm 三、TEST ANTENNA INFORMATION  Antenna Type: PCB antenna  Antenna Radiation Pattern Antenna Radiation Gain Radiation Pattern Plane Frequency [MHz] Max Value [dB] XY 2400 -0.5 dBi 2450 -1.5 dBi 2500 -1.0 dBi XZ 2400 -1.8 dBi 2450 -2.0 dBi 2500 -3.2 dBi ZY 2400 -1.7 dBi 2450 -2.8 dBi 2500 -2.2 dBi Return loss Frequency [MHz] Return loss [dB] VSWR 2400 -11.7 dB 1.75 2450 -31.9 dB 1.02 2500 -12.1 dB 1.65

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. ...................: FCC ID. ......................................... : CTA25112700801 2BK9G-DIF-AU-V3 Compiled by ( position+printed name+signature) : File administrators Zoey Cao Supervised by ( position+printed name+signature) : Project Engineer Ace Chai Approved by ( position+printed name+signature) : RF Manager Eric Wang Date of issue ...................................: Dec. 03, 2025 Testing Laboratory Name .............: Shenzhen CTA Testing Technology Co., Ltd. Address ..........................................: Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Applicant’s name...........................: Green Scent Biotech Company Ltd Address ...........................................: #10/B, China Science Joint Center, Zhenxing RD, Guangming Dist, Shenzhen City, Guangdong, China Test specification ......................... : Standard ..........................................: FCC Part 15.247 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Equipment description ................ : Scent diffuser Trade Mark ......................................: AH Manufacturer ...................................: Green Scent Biotech Company Ltd Model/Type reference .....................: DIF-AU-V3 Listed Models ..................................: DIF-AU-V2, DIF-AU-V4, DIF-AU-V5 Modulation ......................................: GFSK Frequency .......................................: From 2402MHz to 2480MHz Ratings ............................................: DC 5.0V From external circuit Result ..............................................: PASS Report No.: CTA25112700801 Page 2 of 33 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : Scent diffuser Model /Type : DIF-AU-V3 Listed Models : DIF-AU-V2, DIF-AU-V4, DIF-AU-V5 Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number and colour is different for these model. Applicant : Green Scent Biotech Company Ltd Address : #10/B, China Science Joint Center, Zhenxing RD, Guangming Dist, Shenzhen City, Guangdong, China Manufacturer : Green Scent Biotech Company Ltd Address : #10/B, China Science Joint Center, Zhenxing RD, Guangming Dist, Shenzhen City, Guangdong, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA25112700801 Page 3 of 33 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 TEST STANDARDS ...................................................................................................................................... 4 2 SUMMARY .................................................................................................................................................... 5 2.1 General Remarks .............................................................................................................................. 5 2.2 Product Description* .......................................................................................................................... 5 2.3 Equipment Under Test ....................................................................................................................... 5 2.4 Short description of the Equipment under Test (EUT) ...................................................................... 5 2.5 EUT configuration .............................................................................................................................. 5 2.6 EUT operation mode ......................................................................................................................... 5 2.7 Block Diagram of Test Setup ............................................................................................................. 6 2.8 Related Submittal(s) / Grant (s) ......................................................................................................... 6 2.9 Modifications ...................................................................................................................................... 6 3 TEST ENVIRONMENT ................................................................................................................................. 7 3.1 Address of the test laboratory ........................................................................................................... 7 3.2 Test Facility........................................................................................................................................ 7 3.3 Environmental conditions .............................................…

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1 FCC Appendix RF Test Data for BLE FCC ID : 2BK9G-DIF-AU-V3 Company : Green Scent Biotech Company Ltd EUT : Scent diffuser Model Number : DIF-AU-V3 Report No. : CTA25112700801 Reviewed By : Eric Wang 2 Appendix A: DTS Bandwidth Test Result TestMode Antenna Freq(MHz) DTS BW [MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict BLE_1M Ant1 2402 0.640 2401.696 2402.336 0.5 PASS 2440 0.648 2439.688 2440.336 0.5 PASS 2480 0.648 2479.688 2480.336 0.5 PASS 3 Test Graphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 4 5 Appendix B: Occupied Channel Bandwidth Test Result TestMode Antenna Freq(MHz) OCB [MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict BLE_1M Ant1 2402 1.0059 2401.5180 2402.5239 --- --- 2440 1.0053 2439.5178 2440.5231 --- --- 2480 1.0033 2479.5193 2480.5226 --- --- 6 Test Graphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 7 8 Appendix C: Maximum conducted output power Test Result Peak TestMode Antenna Freq(MHz) Conducted Peak Powert[dBm] Conducted Limit[dBm] Verdict BLE_1M Ant1 2402 -3.29 ≤30 PASS 2440 -3.64 ≤30 PASS 2480 -3.67 ≤30 PASS 9 Appendix D: Maximum power spectral density Test Result TestMode Antenna Freq(MHz) Result[dBm/3kHz] Limit[dBm/3kHz] Verdict BLE_1M Ant1 2402 -19.19 ≤8.00 PASS 2440 -19.31 ≤8.00 PASS 2480 -19.40 ≤8.00 PASS 10 Test Graphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 11 12 Appendix E: Band edge measurements Test Result TestMod e Antenn a ChNam e Freq(MHz ) RefLevel[dBm ] Result[dBm ] Limit[dBm ] Verdic t BLE_1M Ant1 Low 2402 -4.34 -54.52 ≤-24.34 PASS High 2480 -4.33 -55.58 ≤-24.33 PASS 13 Test Graphs BLE_1M_Ant1_Low_2402 BLE_1M_Ant1_High_2480 14 Appendix F: Conducted Spurious Emission Test Result TestMode Antenna Freq(MHz) FreqRange [MHz] RefLevel [dBm] Result[dBm] Limit[dBm] Verdict BLE_1M Ant1 2402 Reference -4.85 -4.85 --- PASS 30~1000 -4.85 -68.79 ≤-24.85 PASS 1000~26500 -4.85 -46.94 ≤-24.85 PASS 2440 Reference -4.24 -4.24 --- PASS 30~1000 -4.24 -67.14 ≤-24.24 PASS 1000~26500 -4.24 -47.72 ≤-24.24 PASS 2480 Reference -4.53 -4.53 --- PASS 30~1000 -4.53 -68.28 ≤-24.53 PASS 1000~26500 -4.53 -44.62 ≤-24.53 PASS 15 Test Graphs BLE_1M_Ant1_2402_0~Reference BLE_1M_Ant1_2402_30~1000 BLE_1M_Ant1_2402_1000~26500 16 BLE_1M_Ant1_2440_0~Reference BLE_1M_Ant1_2440_30~1000 17 BLE_1M_Ant1_2440_1000~26500 BLE_1M_Ant1_2480_0~Reference BLE_1M_Ant1_2480_30~1000 18 BLE_1M_Ant1_2480_1000~26500 19 Appendix G: Duty Cycle Test Result TestMode Antenna Freq(MHz) ON Time [ms] Period [ms] X DC [%] xFactor Limit Verdict BLE_1M Ant1 2402 0.41 0.63 0.6508 65.08 1.87 --- --- 2440 0.41 0.63 0.6508 65.08 1.87 --- --- 2480 0.41 0.63 0.6508 65.08 1.87 --- --- 20 Test Graphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 21

FCC ID: 2BK9G-DIF-AU-V3 Test Setup Photos of the EUT FCC ID: 2BK9G-DIF-AU-V3